Lab 3 Finish

.gitignore

@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

build.gradle

@@ -0,0 +1,28 @@
+plugins {
+    id 'java'
+    id 'org.springframework.boot' version '3.0.4'
+    id 'io.spring.dependency-management' version '1.1.0'
+}
+
+group = 'com.example'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '19'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'com.h2database:h2:2.1.210'
+    implementation 'org.springframework.boot:spring-boot-starter-validation'
+    implementation group: 'org.springdoc', name: 'springdoc-openapi-ui', version: '1.6.5'
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+
+}
+
+tasks.named('test') {
+    useJUnitPlatform()
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,240 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,91 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'demo'

src/main/java/com/example/demo/DemoApplication.java

@@ -0,0 +1,15 @@
+package com.example.demo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.RestController;
+
+@SpringBootApplication
+@RestController
+public class DemoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(DemoApplication.class, args);
+    }
+
+}

src/main/java/com/example/demo/WebConfiguration.java

@@ -0,0 +1,12 @@
+package com.example.demo;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+@Configuration
+public class WebConfiguration implements WebMvcConfigurer {
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/**").allowedMethods("*");
+    }
+}

src/main/java/com/example/demo/master/Master.java

@@ -0,0 +1,81 @@
+package com.example.demo.master;
+
+import com.example.demo.order.MastersOrders;
+import jakarta.persistence.*;
+
+import java.util.List;
+import java.util.Objects;
+
+@Entity
+
+public class Master {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long _id;
+    @Column()
+    private String firstName;
+    private String lastName;
+
+    @OneToMany(fetch = FetchType.EAGER, mappedBy = "master", cascade = CascadeType.REMOVE)
+    private List<MastersOrders> mastersOrders;
+
+    public Master() {
+    }
+
+    public Master(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public Long get_id() {
+        return _id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Master master = (Master) o;
+        return Objects.equals(_id, master._id);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(_id);
+    }
+
+    @Override
+    public String toString() {
+        return "Master{" +
+                "id=" + _id +
+                ", firstName='" + firstName + '\'' +
+                ", lastName='" + lastName + '\'' +
+                '}';
+    }
+
+    public List<MastersOrders> getOrders() {
+        return mastersOrders;
+    }
+
+    public void setOrder(MastersOrders mastersOrders) {
+        if (mastersOrders.getMaster().equals(this)) {
+            this.mastersOrders.add(mastersOrders);
+        }
+    }
+}

src/main/java/com/example/demo/master/MasterController.java

@@ -0,0 +1,52 @@
+package com.example.demo.master;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PatchMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/master")
+public class MasterController {
+    private final MasterService masterService;
+
+    @Autowired
+    public MasterController(MasterService masterService) {
+        this.masterService = masterService;
+    }
+
+    @GetMapping("/{id}")
+    public Master getMaster(@PathVariable Long id) {
+        return masterService.findMaster(id);
+    }
+
+    @GetMapping("/")
+    public List<Master> getMaster() {
+        return masterService.findAllMasters();
+    }
+
+    @PostMapping("/")
+    public Master createMaster(@RequestParam("firstName") String firstName,
+                               @RequestParam("lastName") String lastName) {
+        return masterService.addMaster(firstName, lastName);
+    }
+
+    @PatchMapping("/{id}")
+    public Master updateMaster(@PathVariable Long id,
+                               @RequestParam("firstName") String firstName,
+                               @RequestParam("lastName") String lastName) {
+        return masterService.updateMaster(id, firstName, lastName);
+    }
+
+    @DeleteMapping("/{id}")
+    public Master deleteMaster(@PathVariable Long id) {
+        return masterService.deleteMaster(id);
+    }
+}

src/main/java/com/example/demo/master/MasterService.java

@@ -0,0 +1,67 @@
+package com.example.demo.master;
+
+import com.example.demo.order.MastersOrders;
+import com.example.demo.product.Product;
+import jakarta.persistence.*;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.StringUtils;
+
+import java.util.List;
+
+@Service
+public class MasterService {
+    @PersistenceContext
+    private EntityManager em;
+
+    @Transactional
+    public Master addMaster(String firstName, String lastName) {
+        if (!StringUtils.hasText(firstName) || !StringUtils.hasText(lastName)) {
+            throw new IllegalArgumentException("Master name is null or empty");
+        }
+        final Master master = new Master(firstName, lastName);
+        em.persist(master);
+        return master;
+    }
+
+    @Transactional(readOnly = true)
+    public Master findMaster(Long id) {
+        final Master master = em.find(Master.class, id);
+        if (master == null) {
+            throw new EntityNotFoundException(String.format("Master with id [%s] is not found", id));
+        }
+        return master;
+    }
+
+    @Transactional(readOnly = true)
+    public List<Master> findAllMasters() {
+        return em.createQuery("select s from Master s", Master.class)
+                .getResultList();
+    }
+
+    @Transactional
+    public Master updateMaster(Long id, String firstName, String lastName) {
+        if (!StringUtils.hasText(firstName) || !StringUtils.hasText(lastName)) {
+            throw new IllegalArgumentException("Master name is null or empty");
+        }
+        final Master currentMaster = findMaster(id);
+        currentMaster.setFirstName(firstName);
+        currentMaster.setLastName(lastName);
+        return em.merge(currentMaster);
+    }
+
+    @Transactional
+    public Master deleteMaster(Long id) {
+        final Master currentMaster = findMaster(id);
+        em.remove(currentMaster);
+        return currentMaster;
+    }
+
+    @Transactional
+    public void deleteAllMasters() {
+        em.createQuery("delete from Master").executeUpdate();
+    }
+
+
+
+}

src/main/java/com/example/demo/order/MastersOrders.java

@@ -0,0 +1,91 @@
+package com.example.demo.order;
+
+import com.example.demo.master.Master;
+import com.example.demo.product.Product;
+import jakarta.persistence.*;
+
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Objects;
+
+@Entity
+public class MastersOrders {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long _id;
+    @Column
+    private Date dateOfPurchase;
+    @ManyToOne(fetch = FetchType.EAGER)
+    private Master master;
+    @ManyToMany(fetch = FetchType.EAGER)
+    private List<Product> products;
+
+    public MastersOrders() {
+    }
+
+    public MastersOrders(Date dateOfPurchase) {
+        this.dateOfPurchase = dateOfPurchase;
+    }
+
+    public Long get_id() {
+        return _id;
+    }
+
+    public Date getDateOfPurchase() {
+        return dateOfPurchase;
+    }
+
+    public void setDateOfPurchase(Date dateOfPurchase) {
+        this.dateOfPurchase = dateOfPurchase;
+    }
+
+    public void addProduct(Product product) {
+        if (products == null)
+            products = new ArrayList<>();
+        products.add(product);
+        if (product.getOrders() == null) {
+            product.setOrder(this);
+        }
+    }
+
+    public Master getMaster() {
+        return master;
+    }
+
+    public void setMaster(Master master) {
+        this.master = master;
+        if (!master.getOrders().contains(this)) {
+            master.setOrder(this);
+        }
+    }
+
+    public List<Product> getProducts() {
+        return products;
+    }
+
+    public void setProducts(List<Product> products) {
+        this.products = products;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        MastersOrders mastersOrders = (MastersOrders) o;
+        return Objects.equals(_id, mastersOrders._id);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(_id);
+    }
+
+    @Override
+    public String toString() {
+        return "Order {" +
+                "id=" + _id +
+                ", date='" + dateOfPurchase.toString() + '\'' +
+                ", customer='" + master.toString() + '\'';
+    }
+}

src/main/java/com/example/demo/order/OrderController.java

@@ -0,0 +1,4 @@
+package com.example.demo.order;
+
+public class OrderController {
+}

src/main/java/com/example/demo/order/OrderService.java

@@ -0,0 +1,86 @@
+package com.example.demo.order;
+
+import com.example.demo.master.Master;
+import com.example.demo.product.Product;
+import jakarta.persistence.*;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Date;
+import java.util.List;
+
+@Service
+public class OrderService {
+    @PersistenceContext
+    private EntityManager em;
+
+    @Transactional
+    public MastersOrders addOrder(Master master) {
+        if (master == null || em.find(Master.class, master.get_id()) == null) {
+            throw new IllegalArgumentException("addOrder empty fields");
+        }
+        final MastersOrders order = new MastersOrders(new Date(System.currentTimeMillis()));
+        order.setMaster(master);
+        em.persist(order);
+        em.merge(master);
+        return order;
+    }
+
+    @Transactional
+    public MastersOrders addProduct(Long id, Product product) {
+        if (product == null) {
+            throw new IllegalArgumentException("addOrder empty fields");
+        }
+        final MastersOrders currentOrder = findOrder(id);
+        currentOrder.addProduct(product);
+        product.setOrder(currentOrder);
+        em.merge(product);
+        return em.merge(currentOrder);
+    }
+
+    @Transactional()
+    public MastersOrders findOrder(Long id) {
+        final MastersOrders order = em.find(MastersOrders.class, id);
+        if (order == null) {
+            throw new EntityNotFoundException(String.format("Order with id [%s] is not found", id));
+        }
+        return order;
+    }
+
+    @Transactional(readOnly = true)
+    public List<MastersOrders> findAllOrders() {
+        return em.createQuery("select o from MastersOrders o", MastersOrders.class)
+                .getResultList();
+    }
+
+    @Transactional
+    public MastersOrders deleteOrder(Long id) {
+        final MastersOrders currentOrder = findOrder(id);
+        em.remove(currentOrder);
+        return currentOrder;
+    }
+
+    @Transactional
+    public MastersOrders deleteProductsInOrder(Long id, Product product) {
+        final MastersOrders currentOrder = findOrder(id);
+        final Product currentProduct = em.find(Product.class, product.get_id());
+        currentOrder.getProducts().remove(currentProduct);
+        currentProduct.getOrders().remove(currentOrder);
+        em.merge(currentProduct);
+        return em.merge(currentOrder);
+    }
+
+    @Transactional
+    public void deleteAllOrders() {
+        em.createQuery("delete from MastersOrders").executeUpdate();
+    }
+
+    @Transactional
+    public List<MastersOrders> findOrdersWithProduct(Long masterId, Product product) {
+        return em.createQuery("SELECT o FROM MastersOrders o WHERE (o.master._id = :masterId) and (:product member OF o.products)",
+                        MastersOrders.class)
+                .setParameter("product", product)
+                .setParameter("masterId", masterId)
+                .getResultList();
+    }
+}

src/main/java/com/example/demo/product/Product.java

@@ -0,0 +1,81 @@
+package com.example.demo.product;
+
+import com.example.demo.order.MastersOrders;
+import jakarta.persistence.*;
+
+import java.util.List;
+import java.util.Objects;
+
+@Entity
+public class Product {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long _id;
+    @Column()
+    private String _name;
+    private Integer cost;
+
+    @ManyToMany(fetch = FetchType.EAGER, mappedBy = "products")
+    private List<MastersOrders> mastersOrders;
+
+    public Product() {
+    }
+
+    public Product(String _name, Integer cost) {
+        this._name = _name;
+        this.cost = cost;
+    }
+
+    public Long get_id() {
+        return _id;
+    }
+
+    public String getName() {
+        return _name;
+    }
+
+    public void setName(String _name) {
+        this._name = _name;
+    }
+
+    public Integer getCost() {
+        return cost;
+    }
+
+    public void setCost(Integer cost) {
+        this.cost = cost;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Product product = (Product) o;
+        return Objects.equals(_id, product._id);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(_id);
+    }
+
+    @Override
+    public String toString() {
+        return "Product {" +
+                "id=" + _id +
+                ", firstName='" + _name + '\'' +
+                ", cost='" + cost.toString() + '\'' +
+                '}';
+    }
+
+    public List<MastersOrders> getOrders() {
+        return mastersOrders;
+    }
+
+    public void setOrder(MastersOrders mastersOrders) {
+        if (!mastersOrders.getProducts().contains(this)) {
+            mastersOrders.getProducts().add(this);
+        }
+    }
+
+}

src/main/java/com/example/demo/product/ProductController.java

@@ -0,0 +1,51 @@
+package com.example.demo.product;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PatchMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+@RestController
+@RequestMapping("/product")
+public class ProductController {
+    private final ProductService masterService;
+
+    @Autowired
+    public ProductController(ProductService masterService) {
+        this.masterService = masterService;
+    }
+
+    @GetMapping("/{id}")
+    public Product getProduct(@PathVariable Long id) {
+        return masterService.findProduct(id);
+    }
+
+    @GetMapping("/")
+    public List<Product> getProduct() {
+        return masterService.findAllProducts();
+    }
+
+    @PostMapping("/")
+    public Product createProduct(@RequestParam("name") String name,
+                                 @RequestParam("cost") Integer cost) {
+        return masterService.addProduct(name, cost);
+    }
+
+    @PatchMapping("/{id}")
+    public Product updateProduct(@PathVariable Long id,
+                                 @RequestParam("name") String name,
+                                 @RequestParam("cost") Integer cost) {
+        return masterService.updateProduct(id, name, cost);
+    }
+
+    @DeleteMapping("/{id}")
+    public Product deleteProduct(@PathVariable Long id) {
+        return masterService.deleteProduct(id);
+    }
+}

src/main/java/com/example/demo/product/ProductService.java

@@ -0,0 +1,68 @@
+package com.example.demo.product;
+
+import jakarta.persistence.*;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.StringUtils;
+
+import java.util.List;
+
+@Service
+public class ProductService {
+    @PersistenceContext
+    private EntityManager em;
+
+    @Transactional
+    public Product addProduct(String name, Integer cost) {
+        if (!StringUtils.hasText(name)) {
+            throw new IllegalArgumentException("Product name is null or empty");
+        }
+        if (cost < 0) {
+            throw new IllegalArgumentException("Product cost is below 0");
+        }
+        final Product product = new Product(name, cost);
+        em.persist(product);
+        return product;
+    }
+
+    @Transactional(readOnly = true)
+    public Product findProduct(Long id) {
+        final Product product = em.find(Product.class, id);
+        if (product == null) {
+            throw new EntityNotFoundException(String.format("Product with id [%s] is not found", id));
+        }
+        return product;
+    }
+
+    @Transactional(readOnly = true)
+    public List<Product> findAllProducts() {
+        return em.createQuery("select s from Product s", Product.class)
+                .getResultList();
+    }
+
+    @Transactional
+    public Product updateProduct(Long id, String name, Integer cost) {
+        if (!StringUtils.hasText(name)) {
+            throw new IllegalArgumentException("Product name is null or empty");
+        }
+        if (cost < 0) {
+            throw new IllegalArgumentException("Product cost is below 0");
+        }
+        final Product currentProduct = findProduct(id);
+        currentProduct.setName(name);
+        currentProduct.setCost(cost);
+        return em.merge(currentProduct);
+    }
+
+    @Transactional
+    public Product deleteProduct(Long id) {
+        final Product currentProduct = findProduct(id);
+        em.remove(currentProduct);
+        return currentProduct;
+    }
+
+    @Transactional
+    public void deleteAllProducts() {
+        em.createQuery("delete from Product ").executeUpdate();
+    }
+}

src/main/resources/application.properties

@@ -0,0 +1,11 @@
+
+#server.port=8080
+spring.datasource.url=jdbc:h2:file:./data
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=password
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+spring.jpa.hibernate.ddl-auto=update
+spring.h2.console.enabled=true
+spring.h2.console.settings.trace=false
+spring.h2.console.settings.web-allow-others=false

src/test/java/com/example/demo/DemoApplicationTests.java

@@ -0,0 +1,134 @@
+package com.example.demo;
+
+import jakarta.persistence.EntityNotFoundException;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import com.example.demo.order.*;
+import com.example.demo.master.*;
+import com.example.demo.product.*;
+
+import java.util.List;
+import java.util.logging.Logger;
+
+@SpringBootTest
+class DemoApplicationTests {
+
+    @Autowired
+    private MasterService masterService;
+    @Autowired
+    private ProductService productService;
+    @Autowired
+    private OrderService orderService;
+
+    @Test
+    void testOrder() {
+        productService.deleteAllProducts();
+        orderService.deleteAllOrders();
+        masterService.deleteAllMasters();
+        
+        final Product product1 = productService.addProduct("Машинка", 300);
+        final Product product2 = productService.addProduct("Ключ", 200);
+        
+        final Master master1 = masterService.addMaster("Кирилл", "Петрович");
+        
+        final MastersOrders order0 = orderService.addOrder(masterService.findMaster(master1.get_id()));
+        final MastersOrders order1 = orderService.findOrder(order0.get_id());
+        Assertions.assertEquals(order0, order1);
+
+        Assertions.assertEquals(masterService
+                .findMaster(master1.get_id()).getOrders().size(), 1);
+        orderService.deleteAllOrders();
+        Assertions.assertThrows(EntityNotFoundException.class, () -> orderService.findOrder(-1L));
+        final Master customer2 = masterService.addMaster("Александр", "Игоревич");
+        final MastersOrders order2 = orderService
+                .addOrder(masterService.findMaster(customer2.get_id()));
+        orderService.addProduct(order2.get_id(), product1);
+        orderService.addProduct(order2.get_id(), product1);
+        orderService.deleteProductsInOrder(order2.get_id(), product1);
+
+        Assertions.assertEquals(orderService
+                .findOrder(order2.get_id()).getProducts().size(), 1);
+        masterService.deleteMaster(customer2.get_id());
+        Assertions.assertThrows(EntityNotFoundException.class, () -> masterService.findMaster(customer2.get_id()));
+        Assertions.assertThrows(EntityNotFoundException.class, () -> orderService.findOrder(order2.get_id()));
+        Assertions.assertEquals(orderService.findAllOrders().size(), 0);
+    }
+
+    @Test()
+    void testMaster() {
+        masterService.deleteAllMasters();
+        final Master customer = masterService.addMaster("Иван", "Иванов");
+        Assertions.assertNotNull(customer.get_id());
+
+        masterService.deleteAllMasters();
+        final Master customer1 = masterService.addMaster("Иван", "Иванов");
+        final Master findMaster = masterService.findMaster(customer1.get_id());
+        Assertions.assertEquals(customer1, findMaster);
+
+        masterService.deleteAllMasters();
+        Assertions.assertThrows(EntityNotFoundException.class, () -> masterService.findMaster(-1L));
+
+        masterService.deleteAllMasters();
+        masterService.addMaster("Иван", "Иванов");
+        masterService.addMaster("Петр", "Петров");
+        final List<Master> customers1 = masterService.findAllMasters();
+        Assertions.assertEquals(customers1.size(), 2);
+
+        masterService.deleteAllMasters();
+        final List<Master> customers2 = masterService.findAllMasters();
+
+        Assertions.assertEquals(customers2.size(), 0);
+    }
+
+    @Test
+    void testProduct() {
+        productService.deleteAllProducts();
+        final Product ticket1 = productService.addProduct("Руно", 100);
+        Assertions.assertNotNull(ticket1.get_id());
+
+        productService.deleteAllProducts();
+        final Product ticket2 = productService.addProduct("Шоколад", 100);
+        final Product findProduct = productService.findProduct(ticket2.get_id());
+        Assertions.assertEquals(ticket2, findProduct);
+
+        productService.deleteAllProducts();
+        Assertions.assertThrows(EntityNotFoundException.class, () -> productService.findProduct(-1L));
+
+        productService.deleteAllProducts();
+        productService.addProduct("Автомобиль", 100);
+        productService.addProduct("Мячик", 100);
+        final List<Product> tickets1 = productService.findAllProducts();
+        Assertions.assertEquals(tickets1.size(), 2);
+
+        productService.deleteAllProducts();
+        final List<Product> tickets2 = productService.findAllProducts();
+        Assertions.assertEquals(tickets2.size(), 0);
+    }
+
+    @Test
+    void testCommand() {
+        productService.deleteAllProducts();
+        orderService.deleteAllOrders();
+        masterService.deleteAllMasters();
+
+        final Product product1 = productService.addProduct("Машинка", 300);
+        final Product product2 = productService.addProduct("Ключ", 200);
+
+        final Master master1 = masterService.addMaster("Кирилл", "Петрович");
+        final Master master2 = masterService.addMaster("Александр", "Камугович");
+
+        final MastersOrders order0 = orderService.addOrder(masterService.findMaster(master1.get_id()));
+        final MastersOrders order1 = orderService.addOrder(masterService.findMaster(master2.get_id()));
+        final MastersOrders order2 = orderService.addOrder(masterService.findMaster(master2.get_id()));
+        orderService.addProduct(order0.get_id(), product1);
+        orderService.addProduct(order1.get_id(), product1);
+        orderService.addProduct(order2.get_id(), product1);
+
+        Assertions.assertTrue(orderService.findOrdersWithProduct(master1.get_id(), product1).contains(order0));
+        Assertions.assertTrue(orderService.findOrdersWithProduct(master1.get_id(), product2).isEmpty());
+        Assertions.assertTrue(orderService.findOrdersWithProduct(master2.get_id(), product1).contains(order1)
+                && orderService.findOrdersWithProduct(master2.get_id(), product1).contains(order2));
+    }
+}

src/test/resources/application.properties

@@ -0,0 +1,6 @@
+spring.datasource.url=jdbc:h2:mem:testdb
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=password
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+spring.jpa.hibernate.ddl-auto=create-drop